The purpose of the study was to establish the influence of Christian role modeling in mitigating extramarital affairs among members of Churches in Bondeni Sub-location Nakuru County-Kenya. The study was anchored the Cognitive Behaviour Theory. Descriptive research design was utilized. The population comprised3,100 members from 6 churches in the sub-location. Data was collected through questionnaires and interview guide. Both quantitative and qualitative approaches were used to analyze data. SPSS was used as a tool. The results showed that there was a significant negative correlation between incidences of extramarital affairs and Christian role-modeling. In general, the results affirmed the Church as an effective custodian of moral fiber in society with significant effects on regulating the behaviour of the society towards upholding the sanctity of marriage as God instituted it.